SALT LAKE CITY — The Mountain West is growing, the Western Athletic Conference is in danger of being whittled away and BYU is considering going it alone — at least in football.

The west went wild Wednesday in the latest round of conference shuffling in college sports.

Fresno State and Nevada ended a day of fast-paced change by accepting invitations to join the Mountain West Conference, which has added three prominent members of Western Athletic Conference in the last two months.

Boise State is already bound for the MWC next year and now the Bulldogs and Wolf Pack are following as well, leaving the WAC's future in question and the Mountain West preparing for life after Utah — and possibly without BYU, too.

"We're simply looking at getting better and we got better tonight with Fresno State and Nevada joining our league," Mountain West commissioner Craig Thompson said in a conference call Wednesday night.

Thompson spoke after returning from a meeting in Philadelphia with Comcast and CBS officials, who said they wanted the league and its television network — The Mtn. — to reach more markets. The league started the network a few years ago, giving up national exposure on ESPN for more scheduling freedom.

"(Expansion) just made lot of sense at this particular juncture. We got better and we helped our TV position," he said.

The MWC also helped its bargaining position with BYU, which is mulling going independent in football and reportedly joining the WAC in all other sports. The Cougars have not confirmed anything and may need another look before making anything official. At this rate, there might not be much of a WAC left to join.

The Mountain West is covered either way after inviting Fresno State and Nevada to join the league Wednesday morning and both schools accepting before the day was over.

"I think people have been waiting a long time for this day. We think it is really a game changer for us," Nevada president Milt Glick said. "This is a momentous day for the University of Nevada."

Glick said the Wolf Pack's move, which puts Nevada in the same league as state rival UNLV, would either take effect next year or in 2012.

Fresno State president John D. Welty said the Bulldogs will join the MWC in 2011-12, although the Bulldogs later amended that to sometime in the next two years.

Thompson said the latest expansion wasn't a pre-emptive strike if BYU does decide to leave the conference. Nor was it a way to prevent the Cougars from leaving, by giving them no where to go.

But by adding Nevada and Fresno State, the Mountain West is clearly in a stronger position with the Cougars. Thompson also said the additions will increase the conference's chances of earning an automatic bid to the Bowl Championship Series, something the MWC has been pushing for in recent years.

WAC commissioner Karl Benson was out of the office Wednesday and did not immediately return calls and e-mails seeking comment. The WAC announced Benson will hold a teleconference Thursday to address the losses.

The WAC could be down to six members, two short of the NCAA requirement for a conference.

The Mountain West lured Boise State in early June, but learned less than a week later that Utah was leaping west to a higher-profile spot in the Pac-10 along with Colorado. So the Pac-10 becomes 12 and the Big 12, which also lost Nebraska to the Big Ten, settled at 10 members when Texas agreed to stay and keep the remaining parts of the league intact.